FreeTLab
884567beaa
PluriWaveAlarmService becomes the sole ring-audio owner for the whole
ring (WU2 of 2, completes the split started at bd7f883): the linear
step ramp (initialVolume/startFadeIn, 250ms steps) is replaced by a
DeskClock-style exponential dB curve (computeFadeVolume: gainDb =
fraction*40-40, curve = 10^(gainDb/20)) on a 50ms Handler loop anchored
at ring start, not audio start, so all three fallback sources (station,
fallback station, bundled WAV) share one clock and a source that joins
mid-fade enters at the elapsed level instead of restarting from
silence. Each source also recomputes and applies the curve immediately
before start() to stay pop-free through prepareAsync's variable
buffering delay.
The STREAM_MUSIC device-volume override/restore is replaced by manual
AUDIOFOCUS_GAIN_TRANSIENT request/abandon on STREAM_ALARM (no-op focus
listener, requested once per ring in startAudio, abandoned
unconditionally in stopAlarm's full-teardown branch): the service never
calls setStreamVolume on any stream. The fire notification channel
migrates pluriwave_alarm_fire_v2 -> pluriwave_alarm_fire_v3, now silent
(no setSound; native MediaPlayer is the only audible source) while
keeping vibration and IMPORTANCE_HIGH for the full-screen intent; the
migration guard folds in a third delete for the v2 id alongside the two
pre-existing legacy ids, guarded by a renamed channels_migrated_v3 flag
so it still runs exactly once.
Since the Dart ringing screen (WU1) no longer calls confirmFlutterAudio,
overrideMediaVolumeForRing or restoreMediaVolume, their native surface
is now dead: deletes the flutterOwnsRing handoff flag and both its
backstop call sites in PluriWaveAlarmService, and the three
MethodChannel handlers plus their backing methods and companion state
in MainActivity.